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EM4x05/EM4x69 continued + a couple of icemans utils.
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6f1a597855
commit
59f726c989
4 changed files with 134 additions and 24 deletions
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@ -533,6 +533,9 @@ uint8_t EMpreambleSearch(uint8_t *BitStream, uint8_t *preamble, size_t pLen, siz
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return 0;
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}
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// FSK, PSK, ASK/MANCHESTER, ASK/BIPHASE, ASK/DIPHASE
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// should cover 90% of known used configs
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// the rest will need to be manually demoded for now...
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int demodEM4x05resp(uint8_t bitsNeeded) {
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int ans = 0;
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bool demodFound = false;
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@ -546,7 +549,6 @@ int demodEM4x05resp(uint8_t bitsNeeded) {
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ans = FSKrawDemod("0 0", false);
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if (!ans) {
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if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: FSK Demod failed");
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//return -1;
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} else {
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// set size to 10 to only test first 4 positions for the preamble
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size_t size = (10 > DemodBufferLen) ? DemodBufferLen : 10;
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@ -557,7 +559,6 @@ int demodEM4x05resp(uint8_t bitsNeeded) {
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uint8_t errChk = !EMpreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx);
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if ( errChk == 0) {
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if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx);
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//return -1;
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} else {
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//can't test size because the preamble doesn't repeat :(
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//meaning chances of false positives are high.
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@ -565,10 +566,37 @@ int demodEM4x05resp(uint8_t bitsNeeded) {
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}
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}
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}
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// PSK clocks should be easy to detect ( but difficult to demod a non-repeating pattern... )
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if (!demodFound) {
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ans = GetPskClock("", FALSE, FALSE);
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if (ans>0) {
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PrintAndLog("PSK response possibly found, run `data rawd p1` to attempt to demod");
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}
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}
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ans = GetPskClock("", FALSE, FALSE);
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if (ans>0) {
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PrintAndLog("PSK response possibly found, run `data rawd p1` to attempt to demod");
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// more common than biphase
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if (!demodFound) {
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DemodBufferLen = 0x00;
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// try manchester - NOTE: ST only applies to T55x7 tags.
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ans = ASKDemod_ext("0,0,1", false, false, 1, false);
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if (!ans) {
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if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/Manchester Demod failed");
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} else {
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// set size to 10 to only test first 4 positions for the preamble
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size_t size = (10 > DemodBufferLen) ? DemodBufferLen : 10;
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size_t startIdx = 0;
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if (g_debugMode) PrintAndLog("ANS: %d | %u | %u", ans, startIdx, size);
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uint8_t errChk = !EMpreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx);
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if ( errChk == 0) {
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if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx);
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} else {
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//can't test size because the preamble doesn't repeat :(
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//meaning chances of false positives are high.
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demodFound = true;
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}
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}
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}
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if (!demodFound) {
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@ -577,7 +605,6 @@ int demodEM4x05resp(uint8_t bitsNeeded) {
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ans = ASKbiphaseDemod("0 0 1", FALSE);
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if (!ans) {
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if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase Demod failed");
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//return -1;
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} else {
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// set size to 10 to only test first 4 positions for the preamble
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size_t size = (10 > DemodBufferLen) ? DemodBufferLen : 10;
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@ -588,7 +615,6 @@ int demodEM4x05resp(uint8_t bitsNeeded) {
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uint8_t errChk = !EMpreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx);
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if ( errChk == 0) {
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if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx);
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//return -1;
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} else {
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//can't test size because the preamble doesn't repeat :(
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//meaning chances of false positives are high.
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@ -599,11 +625,10 @@ int demodEM4x05resp(uint8_t bitsNeeded) {
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if (!demodFound) {
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DemodBufferLen = 0x00;
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// try manchester - NOTE: ST only applies to T55x7 tags.
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ans = ASKDemod_ext("0,0,1", false, false, 1, false);
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if (!ans) {
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if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/Manchester Demod failed");
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//return -1;
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//try diphase (differential biphase or inverted)
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ans = ASKbiphaseDemod("0 1 1", FALSE);
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if (!ans) {
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if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase Demod failed");
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} else {
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// set size to 10 to only test first 4 positions for the preamble
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size_t size = (10 > DemodBufferLen) ? DemodBufferLen : 10;
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@ -614,7 +639,6 @@ int demodEM4x05resp(uint8_t bitsNeeded) {
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uint8_t errChk = !EMpreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx);
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if ( errChk == 0) {
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if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx);
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//return -1;
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} else {
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//can't test size because the preamble doesn't repeat :(
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//meaning chances of false positives are high.
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@ -624,8 +648,10 @@ int demodEM4x05resp(uint8_t bitsNeeded) {
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}
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if (demodFound && bitsNeeded < DemodBufferLen) {
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setDemodBuf(DemodBuffer + ans + sizeof(preamble), bitsNeeded, 0);
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CmdPrintDemodBuff("x");
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if (bitsNeeded > 0) {
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setDemodBuf(DemodBuffer + ans + sizeof(preamble), bitsNeeded, 0);
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CmdPrintDemodBuff("x");
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}
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return 1;
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}
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return -1;
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@ -673,10 +699,9 @@ int CmdReadWord(const char *Cmd) {
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return -1;
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}
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//need 32 bits for read word
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demodEM4x05resp(32);
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return 1;
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//attempt demod:
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//need 32 bits from a read word
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return demodEM4x05resp(32);
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}
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int usage_lf_em_write(void) {
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@ -693,6 +718,7 @@ int usage_lf_em_write(void) {
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PrintAndLog(" lf em writeword 1 deadc0de 11223344");
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return 0;
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}
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int CmdWriteWord(const char *Cmd) {
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uint8_t ctmp = param_getchar(Cmd, 0);
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if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em_write();
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@ -738,7 +764,14 @@ int CmdWriteWord(const char *Cmd) {
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}
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setGraphBuf(got, sizeof(got));
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//todo: check response for 00001010 then write data for write confirmation!
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return 0;
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//attempt demod:
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//need 0 bits demoded (after preamble) to verify write cmd
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int result = demodEM4x05resp(0);
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if (result == 1) {
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PrintAndLog("Write Verified");
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}
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return result;
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}
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/*
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